sex ratio

(redirected from Birth ratio)
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Related to Birth ratio: Total fertility rate

sex ratio

n.
The proportion of males to females in a given population, usually expressed as the number of males per 100 females.
References in periodicals archive ?
Improvements made already included increasing the midwife to birth ratio, with plans to further extend this, improved provision of pain relief in A&E, and training staff in the use of Do Not Attempt Resuscitation Orders.
Since many families, particularly in rural areas, still subscribe to the traditional Chinese belief that a son is more valuable than a daughter, many parents have, over the past two decades, aborted female fetuses, leading to a birth ratio of someAaAaAeAeAaAeAeA 118AaAaAeAeAaAeAeA boys toAaAaAeAeAa girls.
In maternity, inspectors raised "serious concerns", including over a low midwife to birth ratio, and noted wards were closed regularly.
In addition, the report said the types of cancer were similar to those found amongst the Hiroshima survivors who were exposed to "ionizing radiation from the bomb and uranium in the fallout" and that an 18% fall in the male birth ratio (to 850 per 1000 female births, compared to the usual 1050) was similar to that seen after the Hiroshima atom bombing.
Addressing a meeting here on Wednesday, she said a birth ratio had been increased alarmingly during last two decades and if this pace of birth rate continued, the country might experience food dearth in years to come.
We calculated the expected number of female births by dividing the observed number of male births by the natural birth ratio of 105 male per 100 female births.
Currently, the number may be 914, but it still shows [the] female birth ratio is just about 46 per cent," she said.
In China, it is even worse: According to the China Ministry of Civil Affairs, in 2009, the birth ratio due to sex-selection abortion was 120 boys to 100 girls.
However NHS West Midlands questioned the figures as it had increased its midwife to birth ratio.
But even if every nation's male-female birth ratio returned to normal tomorrow, the excess male births thus far would skew the global population for decades to come.
Demographic and behavioral determinants of male-to-female birth ratio in Spain from 1981 to 1997.